Helicoconchus

Helicoconchus Temporal range: Early Permian [1] PreꞒ Ꞓ O S D C P T J K Pg N
Helicoconchus elongatus Wilson et al., 2011 from Lower Permian of Texas.
Scientific classification
Kingdom:	Animalia
Phylum:	incertae sedis
Class:	Tentaculita †
Order:	Microconchida †
Genus:	Helicoconchus † Wilson, Yancey and Vinn, 2011

Helicoconchus is a microconchid genus that occurs in the Lower Permian of Texas. It forms small reef-like bodies of tubes branching from a common origin. The impunctate tubes are greatly elongated for microconchids and have occasional diaphragms with central pits. The tubes branch in two ways: budding from the tube wall and binary fission. They lived in shallow, normal marine environments. ^[1]

Helicoconchus elongatus; view of branching aggregation of tubes.

References

1. Wilson, M.A.; Yancey, T.E.; Vinn, O. (2011). "A new microconchid tubeworm from the Lower Permian (Artinskian) of central Texas, USA". Acta Palaeontologica Polonica. 56: 785–791. doi: 10.4202/app.2010.0086 .